"Continued Urbanization Growth has become Detrimental to the Local Waters within the Cahokia-Joachim Watershed."
RIDGEMOOR DRIVE RUNOFF IMPROVEMENT PROJECT
St. Louis County, MO is a region near the city of St. Louis that incorporates dozens of municipalities ranging from humble towns to bustling metropolitan hubs. One such hub is the city of Clayton, MO. Mere miles from the heart of St. Louis, Clayton arose from a humble farming settlement to high stature as the major metropolitan hub to St. Louis and county seat. Interestingly enough, more than three quarters of Clayton’s land is dedicated residential and park property but has a business district with nearly eight million square feet of combined office and retail space. The rapid urbanization of Clayton is a glimpse of booming growth of the whole of St. Louis County but growth is not without consequence. For years many municipalities in St. Louis County have been exempt from prior national stormwater management regulations, however the continued urbanization growth has become detrimental to many of the local waters in the Cahokia-Joachim Watershed.
This issue left unaddressed, would spell disaster for local ecosystems, neighboring watersheds, wildlife and human health. As a result Clayton partnered with the St. Louis MSD to remedy the situation by installing new detention basins, stormwater drain lines and an NSBB™ hydrodynamic separator at Oak Knoll Park to handle current and preventative pollution concerns relating to Black and Deer Creeks. These local water sources have become impaired by high chloride and E Coli levels within the water as well as trash debris. The NSBB™ will work to help lower these pollutants and prevent their rise in the future, thus ensuring a healthy watershed.
NSBB™ Eviscerates E Coli and Caps Chloride Levels
After extensive stream monitoring by the St. Louis MSD, it was determined that the most prominent sources of pollution in the local watershed are from E Coli, Chloride and suspended solids which cause turbid waters. According to the Nationwide Urban Runoff Program, storms are direct causal events tied to peaking bacteria levels via the carrying of pathogens linked heavily to pet waste. Snow storms in particular have caused spikes in salinity of local streams due to the increased use of chloride to melt
snow and ice from roads, sidewalks and driveways. Furthermore, in both instances, the increase in suspended solids from trash and organic debris have contributed to the turbidity of the Black and Deer Creeks. In response to these findings, Clayton has made significant efforts to manage and maintain proper use of calcium chloride in the winter moths as well as take the community outreach approach to educate and make citizens aware of the danger of untreated pet waste. As a further measure to combat said pollutant problems, Clayton installed an NSBB™ filtration device within the limits of Oak Knoll Park. This treatment device excels at minimizing TMDL's and will be an invaluable asset to the purity and health of the local watershed for years to come.
Clayton's NSBB™ Helps Maintain Regional Prominence
Developed by Suntree Technologies Inc®, the NSBB™ is a hydrodynamic separator unit which specializes in online nutrient and sediment capture without the typical headloss and scouring. It’s patented lidded screens prevent nutrient leaching and static water from turning septic due to the prolonged contact with pathogen ridden trash and debris. The inclusion of a SkimBoss® floating skimmer prevents debris from passing through the vault during high flows and an attached StormBoom™ absorbs hydrocarbons. Personnel were on site on Ridgemoor Drive in Clayton on 10/27/16 to install the NSBB™ internal components and set the vault. Confined space entry is not
required, effectively saving time, effort and service costs via vacuum truck servicing through manholes on the surface. The completion of the project was a joint effort between contractor Kolb Grading LLC, engineer Lochmueller Group, Wieser Precast Concrete, distributor A.S.P. Enterprises Inc and manufacturer Suntree Technologies.
The Phase 2 Stormwater Management Plan of St. Louis County will ensure that the ecosystem will not be a casualty of urbanization. Regional municipalities will be able to align with national regulations, while Clayton’s commitment to improving the runoff quality of its local watershed will only help to solidify its prominence as a leader in St. Louis County.
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